At a game center, a girl named Saotome Mai passionately plays fighting games, proudly undefeated and drawing attention from everyone around for her intense focus. One day, Ijuin Rei, the game's developer, appears before her. Watching Mai's gameplay intently and moved by her passion, Rei invites her to test a new game. Mai, who has long admired Rei, immediately accepts the offer. The next day, testing begins at a private, reserved game center. The new game connects players directly to the machine, allowing them to fight as characters within a virtual space. However, this game holds an unexpected secret: all sensations experienced in-game are fully transmitted to the player's real body. Damage causes real pain, while in-game caresses produce genuine pleasure. Trapped in the virtual world with no way to escape by her own will, Mai finds herself gradually seduced and dominated by Rei, ultimately succumbing completely.